A little info here regarding fitting of the later Map Sensor :
http://www.scoobynet.com/lighting-an...or-wiring.html
Note : When fitting this to an MY93-96 the boost target specified by your Apexi PFC will not align with the boost level reached. This is due to the different scaling voltage of the newer MAP sensor. You will need to calibrate the PFC with your external boost gauge.
It is possible to re-calibrate the scaling on a MY93-96 OEM ECU for the newer MAP sensor but only when fitting an ESL Live Daughterboard inside the ECU.